Curb ramp



FIG. 1 is a perspective view of a curb ramp showing my design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a back view thereof; and,

FIG. 6 is a side view thereof, the other side being a mirror image thereof. 

The ornamental design for a curb ramp, as shown and described. 